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20/20 hind sight means that we always see events more clearly after they have happened then before. The reference of 20/20 comes from an eye test that one would take at an eye doctor's office. A person with 20/20 eyesight can clearly see at 20 feet what a person of normal vision should see at 20 feet. If a person has 20/30 eyesight than he can only clearly see at 20 feet what a person with normal vision can see at 30 feet. If a person has 20/15 vision then he can clearly see at 20 feet what others with normal vision can see at 15 feet.

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15y ago

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